email problems
 

I can not send email anymore
could not execute /usr/sbin/sendmail -t -i

Error from Apache log:
[unixd:alert] [pid 1357] (1)Operation not permitted: AH02156: setgid: unable to set group id to Group 0

Error from Exaim panic.log:
unable to set gid=6004 or uid=0 (euid=0): forcing real = effective

CentOS 7
ISPmanager Business 5.95.3

In the /etc/passwd file check the lats string and user gid. Then add the following data into the httpd configuration file:

<IfModule mpm_itk_module>
LimitUIDRange 0 10000
LimitGIDRange 0 10000
</IfModule>

where 10000 is the UID and GID limit, i.e. it should be larger than the largest user GID in etc/passwd.